Objective: To explore the expression of AEG-1(Astrocyte elevated gene-1)protein in osteosarcoma and its relation to clinicopathologic features. Methods:The AEG-1 protein levels in 45 cases of osteosarcoma and were detected by immunohistochemistry. Results:The positive rate of AEG-1 in osteosarcoma was 51.1%. The positive expression of AEG-1 was associated with tumor size and pulmonary metastasis. Conclusion:AEG-1 may play a role in the carcinogenesis of osteosarcoma and may be an effective prognostic factor.